Sewing-machine shuttle



L. E. WEAVER.

SEWING MACHINE SHUTTLE. APPLICATION FILED NOV. 15, I910.

1530222 jZQZZJ EM an 2% Patented Nov. 4, 1919.

o rrnn s'rarns ATEN LUOIUS E. WEAVER, OF EAST HAMPTON, CONNECTICUT,ASSIGNOE TO THEOPHILUS KING, OF BOSTON, MASSACHUSETTS.

SEWING-MACHINE SHUTTLE.

Application filed November 15, 1918.

East Hampton, in the county of Middlesex, and State of Connecticut, haveinvented new and useful Improvements in Sewing-Machine Shuttles, ofwhich the following is a specification.

This invention relates to a sewing-machine shuttle having a bobbinchamber adapted to receive a ready-wound bobbin composed of a .papercop-tube and a wind to positively engage the cop-tube 15, the

ing of thread thereon. V Y

The invention has for its object first, to provide a shuttle of thischaracter with improved means for controlling the rotation of the bobbinand preventing it from rotating loosely and delivering loose thread.

The invention also has for its object to fully utilize the space in thebobbin chamher for the storage of thread, so that the maximum yardage ofthread may be contained in the shuttle, thus enabling the shuttle to be;used for a relatively long period without replenishment.

The invention is embodied in the improvements which I will now proceedto describe and claim.

Of'the accompanying drawings forming a part of this specification,

Figure 1 is a plan view of a shuttle embodying the invention, withoutthe bobbin.

Fig. 2 is a section on line 2-2 of Fig. 1.

Fig. 3 is a sectional view of an ordinary form of ready-wound bobbin-Fig. 4 is'a plan view of the shuttle with a bobbin.

Fig.5 is a section on line 55 of Fig. 4.

Fig. 6 is a perspective view, showing thev tubular stud hereinafterreferred to, and

portions of the bobbin support.

1 the parts shown by Fig. 6;

Specification of Letters Patent.

7 is a perspective sectional view of- Patented Nov. 4, 1919.

Serial No. 262,704.

of the bobbin chamber, the opposite end of saidchamber being open forthe reception of a ready-wound bobbin, composed of a paper-.cop-tube l5and an annular winding 16 of thread thereon.

To the support or cross bar 13, is rigidly attached a stud 17 arrangedat the center of the. chamber and constituting an axle on which a hub 18is rotatable. Said hub is a tube formed to enter and engage the coptube15, the external surface of the hub being preferably non-cylindrical andadapted hub being here shown as externally polygonal and having numeroussalient angles adapted to indent the inner surface of the cop-tube. I eI provide means detachably connected with the stud for confining the hubagainst endwise displacement, frictional means being provided within'thehub for preventing loose rotation of the huband bobbin.

The stud 17. is tubular and provided at its inner end with" an internalshoulder 20, forming a seat for the headof ascrew 21. 22 is a sleevelongitudinally split by slots 23 and formedto fit the bore of the stud17. The sleeve 22 is provided with. a holdv ing-down head 24 overhangingaportion-of the hub 18. The sleeve 22' is internally threaded to engagethe screw 21, which is formed to'expandthe sleeve into bindingengagement with the bore of the stud 17. The inner end of the stud 17 isprovided with an annular shoulder or enlargement 25, forming an innerspring abutment and a bearing on which the inner end portion of the 'hub18 is adapted to rotate; The outer end portion 'of the hub, isprovidedwith .an internal annular shoulder 26, adapted'to rotate .on the outerend-portion of the stud 17, said internal shoulder forming an outerspring abutment. 27 represents ahelical spring interposed between theinner abutment formed by the external shoulder 25 and the outer abutmentformed by the internal shoulder 26. Said spring-is adapted to hold theshoulder 26. in yielding frictional contact with the holding-down head24:, and thereby prevent loose rotation of the hub and bobbin.

The described parts are adapted to be conveniently assembled, the spring27 being first applied to the stud, the hub 18 being next applied to thestud and spring. The split sleeve 22 is theninserted in the stud fromthe outer end thereof, and the screw 21 is finally inserted in the studfrom the opposite end. The hub. is now confined against endwisedisplacement on the stud, and loose rotation of the hub andbobbin isprevented by the cooperation of the spring- 27, the internal shoulder.26, and the holding-down head 24. 7 v I It will be seen that theready-wound bobbin does not require the usual heads applied to oppositeends of the hub, This is due to the fact that the hub 18 is confinedagainst en'dwise displacement and is prevented from rotating} loosely bymeans located entirely within the hub, and therefore within the coptube15, so that no space external to the bobbin is required for thereception of frictional means to prevent loose rotation of the bobbin.Practically the entire distance between the inner and outer ends of thebobbin chamber may, therefore, be utilized for the storage of thread,the bobbin being correspondingly enlarged or lengthened.

I claim:

1. A sewing-machine shuttle comprising a,

body having a bobbin chamber, and a bobbin support at one end of thechamber, the opposite end being open, a stud fixed to said support andarranged'at the center of the chamber, a hub rotatable on said stud andformed to enter and engage the cop-tube of a ready-wound bobbin insertedin the open end of the chamber, the stud being tubular,

and provided at its inner end with a screw-- head seat, and hubconfiningmeans detachably connected with the stud and including aninternallythreaded split sleeve fitting the v bore of the stud and having aholding-down head overhanging a portionvof the hub, and a screw adaptedto expand saidsleeve into binding engagement with the stud and having ahead formed to bear on said seat, frictional means including saidholding-down head being provided within the hub'for pre-' venting looserotation of the hub and bobbin. 2. A sewing-machine shuttle comprising abody having a bobbin chamber, and a bobbin support at one end of thechamber, the opposite end being open, a studfixed to said sup. port-andarranged at the center of the chamber, a hub rotatable on said stud and"formed r to enter and engage the cop-tube of a ready Copies of thispatentimay be obtained for wound bobbin inserted in the open end of thechamber, means detachably connected with the stud for confining the hubagainst endwise displacement, said means including fi ver cents each, byaddressing Washington, D. 0.

site end being open, a tubular stud fixed to said support and arrangedat the center of the chamber, saidstudhaving at its inner end anexternal shoulder forming an inner spring abutment and a hub bearing,and an internal shoulder forming a screw-head seat,

a split internally threaded sleeve fitting the bore of the stud andprovided at its outer end with a holding-down head, a screw adapted toexpand said sleeve into binding engagement with the stud, and providedwith a head adapted to bear on said seat, a hub formed to enter andengage the cop-tube of a ready-wound, bobbin inserted in the open end ofthe chamber, said hub being formed at its inner end to rotate on theexternal shoulder of the stud, and provided at its 7 outer end portionwith an internal shoulder adapted to rotate on the outer end portion ofthe stud, said internal shoulder forming an outer spring abutment, and aspring in-. V

terposed between said inner andouter abutments and adapted to hold said"internal hub shoulder in yielding frictional contact with saidholding-down head, and thereby prevent loose rotation of the hub andbobbin.

. 4. A sewing-machine shuttle comprising a body having a bobbin chamber,and a bobbin support at one end of the chamber, the opposite end beingopen, a stud fixed to said support and arranged atthe center of thechamber, a hub, rotatable on said stud and formed to enter andpositively engage the cop-tube of a ready-wound bobbin inserted in theopen end of the chamber, and means detachably connected with the studfor confining the hub against endwise displacement, frictional meansbeing provided'within the hub for preventing loose rotation of the huband bobbin, the hub being provided with a non-cylindrical externalsurface formed to indent the inner surface of the cop-tube.

signature.

, the Gomniissioner'of Patents,-

' In testimony whereof. I have aflixed my

